posted
I'm planning on running 4 12's in a shared ported chamber box. 2 12's will be firing forward and 2 will fire upward. Also i wish to have the ports face forward only. Is that going to be okay or will there be any cancelation because of the directions of the subs. By the way, this will be in a crx. thanks
Posts: 88 | From: Westminster | Registered: Jan 2003
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I would imagine that if you plan on having a pair of woofers firing UP , they will be firing into the roof , and therefore have a different "loading" characteristic than the 2-12's firing FORWARD with the shared port .
I feel that if each 12 was in it's own chamber with it's own port, your results would be better . Keep in mind that the port will be tuned an octave above or below the tuning frequency of the woofer, so you want it on the same plane for proper output.
The ideal location for a port is "Half the diameter of the woofer away from the cone, and any cabinet wall ", positioned on the SAME PLANE (same side) of the woofer . (almost impossible in any car with woofers in excess of 10inches diameter) Have you considered any other option ? 6-10's ?
-------------------- E.C. Wuz here Posts: 1057 | From: Vancouver, British Columbia, Canada 'eh | Registered: May 1999
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i would personaly never face subs in diferent directions. thier is alot of canceling when doing that. ive never worked in a hatchback so maybe its diferent.... but ive played with directioning in my trunk before and it made a HUGE diference!!! why not just make a wall for your subs?
-------------------- clarion dxz835mp MP3 player, RE35-1D amplifier SOLD , and a 15inch adire-brahma SOLD gotta start rebuilding AGAIN..... still saving$$$ for some good mids. "If you can’t hear it before you see it, What is the point" new boy pictures http://www.sounddomain.com/id/addiction2bass old car http://www.sounddomain.com/id/towncarpimpen Posts: 1732 | From: indianapolis, IN west side.......LOL | Registered: Feb 2003
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I can't wall the crx. So, should i fire all 4 subs upward with the ports upward also? I already have the 4 12s so the 10's are out of the questions.
Posts: 88 | From: Westminster | Registered: Jan 2003
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posted
You can run 4 12's in a typical CRX box. Subs up and ports back. 29x29x14 4 4"x12" ports
-------------------- If it don't make you throw up it ain't loud enough.
2003 USACi World Finals 3rd Place 0-150 Stock 2004 USACi World Champion 0-300 SS 6X USAC World Record Holder In Loving Memory Of My Father Joe Leon Hoskins 1937-2004 Posts: 235 | From: Texas | Registered: Nov 2002
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